ah... NOW I se this thread... I've already used Atom Apple's 1337 M4N UB3R H3RO and CorruptComics' robots form CorruptHardware... I'm pretty sure we don't need to ask Hero's permission, especially if we're Rioteers...
Actually, I'd prefer a heads up when I get used in a comic. Not that people can't use my character, I'd just appreciate knowing where and how I'm going to be represented.
The broadcasts are free game though. Anyone and their registered mother can use those.